1920 Pilgrim Tercentenary Mayflower Single 1 Cent Postage Stamp - MNH, OG - Sc# 548
1933 Byrd Antarctic Expedition Single 3c Postage Stamp - Sc#733 - MNH,OG
1949 Wright Bros Airmail Block Of 4 6c Postage Stamps - Sc# C45 - MNH - CW400c
1949 Wright Brothers Airmail Single 6c Postage Stamp - Sc C45 - MNH, OG - CW400b
1950 California Statehood Gold Plate Block of 4 3c Postage Stamps - Sc 997 - MNH - DS136b
1954 Lewis & Clark Expedition Plate Block of 4 3c Postage Stamps - MNH, OG - Sc# 1063
1954 Lewis & Clark Expedition Single 3c Postage Stamp - MNH, OG - Sc# 1063
1959 Artic Exploration 1909 Single 4c Postage Stamp - Sc#1128 - MNH,OG
1959 Arctic Explorations Plate Block of 4 4c Postage Stamps - Sc# - 1128 - MNH, OG - CX689
1959 Silver Centennial Plate Block of 4 4c Postage Stamps - Sc# - 1130 - MNH, OG - CX686
1967 Davy Crockett Plate Block of 4 5c Postage Stamps - Sc# 1330 - MNH, OG - CX485
1968 Daniel Boone Plate Block of 4 6c Postage Stamps - MNH, OG - Sc# 1357
1968 Daniel Boone Single 6c Postage Stamp - MNH, OG - Sc# 1357
1968 Leif Erikson Single 6c Postage Stamp - MNH, OG - Scott# 1359 - CX348
1968 Marquette Explorer Plate Block Of 4 6c Postage Stamps - MNH, OG - Sc# 1356 - CX346
1968 Marquette Explorer Single 6c Postage Stamp - Sc# 1356 - MNH,OG
1968 USA Leif Erikson Plate Block Of 4 6c Stamps - MNH, OG - Scott# 1359 - CX348
1969 John Wesley Powell - 1869 Expedition - Single 6c Postage Stamp - Sc# 1374 - MNH,OG
1969 John Wesley Powell Plate Block Of 4 6c Postage Stamps - MNH, OG -Sc# 1374 - CX359
1978 Captain James Cook Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1732, 1733 - CX336a
1978 Captain James Cook Plate Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1732 - CX336
1978 Captain James Cook Plate Block Of 4 13c Postage Stamps - MNH, OG - Sc# 1733 - CX327
1982 Ponce De Leon Block of 4 20c Postage Stamps - MNH, OG - Sc# 2024
1982 Ponce DeLeon Single 20c Postage Stamp - Sc# 2024 - MNH,OG
